人教版三年级数学下册口算题练习题及答案演示文稿课件

80×10=700×20=60×20=90×90=50×40=40×80=24×10=12×200=40×40=50×60=90×50=80×20=200×40=12×30=22×30=11×70=60×60=50×30=60×300=80×70=40×90=23×20=70×70=30×80=60×90=20×70=80×50=40×60=8004601400400049001800066045002401200240024005600770160024008100200016008000360036005400300032001400036015008004601400400049001800066045001

11×40=31×20=40×30=60×80=

90×70=43×20=20×50=22×30=

20×90=50×50=70×60=12×40=

90×80=500×30=80×60=33×30=40×70=89×30≈24×39≈32×48≈63×29≈43×22≈71×80≈35×19≈44063001800720028001800620860250015000270080056008004800420010001200800150099084066048004406300180072002800180062086022

52×68≈20×60=700×30=90×30=80×40=80×80=50×70=15×20=

400×20=4.5＋2.3=1.4＋0.8=6.2+3.9=2.7－1.5=1.1－0.3=8.4－7.5=30×50=

14×50=80×60=11×80=20×90=

80×30=60×30=20×13=1.4－0.8=35003002700150010.10.618006.86400120035001800210000.88802.20.92400480070032001.2800026035003002700150010.10.618006.863

6＋0.6=7.8＋0.5=5.3－1.7=3.8－1.9=4.6＋2.7=30×50=60×50=80×90=660÷3=50×70=16×5=47×30=150÷5=20×32=2700÷9=30×80=40×21=680÷2=24×20=40×15=11×70=30×12=240÷3=90×11=8407708.3150035006403403603.6300080300480801.97200141024006009907.3220306.68407708.3150035006403403603.634

13×60=79×20≈41×69≈42×39≈31×99≈72×39≈63×48≈540÷9=22×40=60×30=6300÷9=15×20=800÷2=90×50=200×40=63÷3=78÷4≈138÷7≈52×68≈0.9＋0.6=0.4＋0.3=1.7－1.5=1.2－0.7=0.7＋0.3=7803000880400200.71600280018004500200.20.53500800070030002800160060300211.51.07803000880400200.71600280018005

0.8－0.2=0.6＋0.5=1.9－1.8=1.6＋0.2=4.5＋2.5=1－0.8=2.4－0.9=7.3＋5.6=4.6－2.1=6.5－2.3=9.8＋5.7=9.5＋3.7=16.3－12.5=560÷7=0.6＋1.2=40×80=66÷2=0.8＋4.7=20×14=3600÷6=12×300=2000÷5=7.8＋0.5=1.4－0.8=0.67.02.53.8330.21.136004.2805.54008.32801.815.51.50.10.6600320013.212.91.80.67.02.53.8330.21.136004.28056

1800÷3=52×68≈81×59≈243÷8=

632÷9≈15.4－7.9=10.8＋3.4=750÷5=5600÷8=8.7－3.5=2.3＋3.4=300×90=

120÷4=4.7＋2.1=550÷5=403÷4≈

89×41≈716÷9≈29×48≈5.7＋3.9=

8.4－3.6=59×64≈32×3=38－2=600707003036004.835005.27.56.8803600480014.25.7110150096369.61002700015030…3600707003036004.835005.27.56.87

450÷9=72×2=14×5=63×10=80×30=2.4＋4.9=6.7－0.8=6.5＋0.8=

3.8＋0.7=5.2－0.6=2.4－0.8=4.1－3.4=

6.6－0.7=3.8＋0.3=7.2＋0.5=0.6－0.3=

7.3－6.1=0.8－0.6=1.9－1.4=0.6＋3.1=

2.7－2.7=3.8－2.2=5.1－3.1=7.8－7.2=5024004.55.91.201447.34.64.10.21.620.57.71.65.9700.63.70.30.77.36305024004.55.91.201447.34.64.10.8

3.9－0.9=12.4＋3.9=14.1－3.4=3.6－2.8=

5.3＋4.6=8.3＋10.7=12.7－10.8=13.6－0.6=

13.7＋12.8=20×2=20×5=30×6=

300÷4=200÷5=25×3=26÷2=

13×2=50×70=20×5=3.6－3.6=

3.6＋0.4=7.2－0.5=2.8－0.2=3.7－0.7=3.09.926.575264.03500404016.3196.710.71.9100751002.63.0013180130.83.09.926.575264.03500404016.319

45×20=14×30=60×80=9.5－0.7=

500÷5=309÷3=40×30=4.9＋4.9=

480÷4=23×10=130×3=3.8－2.4=

210÷7=5.6＋2.4=25×4=880÷8=

16×5=10.8＋8.2=10－8.4－1.5=

8.4－7.5=12.8＋13.9=630÷5=240÷4=90010012030800.923010342081926.712610039012004800600.11101.49.88.890010012030800.92301034208192610

40×10=30×15=400÷5=11×80=14×20=640÷4=22＋69=60×80=160÷8=0÷6=240÷8=132÷2=

5.8＋66.7=15×30=11×40=12×50=32×200=38×20≈41×39≈32×40≈

27×29≈62×50≈42×24≈82×79≈4002802072.56400450160090045080030008091304401600800640012006006648008804002802072.564004501600900450811

36×41≈21×40=14×20=111×40=140×2=32×30=72×10=36×10=

40×15=23×30=60×12=50×20=60×15=14×20=19×13≈11×36≈

96×72≈49×51≈58×21≈98×26≈

24×18≈16×19≈0.5＋0.8=10.8＋2.9=1600280600900700040096084069028025004001.3120020072072028013.730004001000360444016002806009007000400960840690212

1.9＋0.6=6.5－3.7=0.9＋0.2=0.4＋0.3=

0.8－0.4=0.6＋0.3=3.4－0.7=2.7＋3.8=

4.3－0.8=2.1＋4.9=18.3－7.5=0.3＋17.6=

2.2－0.6=6－3.2=10－9.2=4.2＋4.2=

4.3－1.2=6.2＋7.7=5.5－3.7=8.4－7.5=

1.1－0.3=6.2－3.9=1.2＋12.7=24×30=2.50.43.51.63.10.872.813.92.30.92.81.12.710.80.813.91.87200.98.417.96.50.72.50.43.51.63.10.872.813.92.3013

30×16=28×7=490÷7=0÷8=

824÷4=24×5=58×0=1.4＋2.3=304×6=630÷7=0.6＋1.7=12×30=

4000÷5=1.3－0.8=432÷4=5－0.4=

600×9=1.8－0.9=2.7＋0.5=4200÷7=980÷7=10.1－8.4=79÷4≈550÷8≈48020618248005400140120196900.50.91.7203.