四年级上册口算400道(二)

1、2.8-1.2= 0.81-0.19= 9.7-7= 7.8+2.2= 1-0.37= 31052= 4(25+50)= 32.819= 24030= 10000.8= 3.060.2= 8125= 0.671.24= 76.28= 8.20.01= 9923= 504= 51000= 0.429.5= 100.5= 65254= 0.08100= 1.820.63= 4.51.5= 10.63= 23199= 3.72.5= 32+268= 1.30.7 = 2.40.6 = 7997= 24192419= 7.52.8= 5.53.2= 12062= 910070= 4（3625）= 1-

2、0.2= 4.31.5= 3008416= 21.1 = 145-99= 1025= 3.560= 3.12+5.2= 11.38.6= 0.23400= 0.59+0.22= 600.5= 20.29= 457+198= 756197= 45+15-45+15= 5.4-2.5-1.4= 5.53= 14.59.5= 400258= 4168= 1.2538= 0.90.26= 821202= 12516= 16.4（3.5+6.4）= 12.6+5.3+6.4= 9646= 5.4-2.5-1.4= 2-0.35-0.65= 6.4+1.07-0.47= 1.50.04= 42035= 0

3、.49+0.61= 5580= 11.7+2.3= 735-298= 81027= 10-8.25= 3200400= 360120= 1.29-0.18= 15（100+3）= 0.6+5.47= 36+54= 7000200= 398+294= 500-12= 25040= 125800= 97-59= 644= 998-299= 240400= 54-15= 1407= 299+455= 1560= 9100700= 90050= 17+49= 25+68= 542-298= 152-46= 620-290= 100-79= 860-370= 038= 670-540= 894-399=

4、 68101= 1940= 474= 95-64= 4019= 952= 590+30= 110050= 83-25= 997+674= 3200200= 420030= 5500500= 446= 71-17= 90060= 60-52= 60-36= 7+75= 1000050= 500-27= 6600110= 91-23= 2250= 0346= 12532= 21500= 12504= 439+61= 392+208= 188+702= 15400= 200-47= 289-98= 66+25= 239+42= 6550= 652= 545= 65013= 740370= 7540=

5、 14030= 96003200= 295= 200-104= 15+97= 582= 724= 1000-37= 6000150= 101+52= 47-19= 5405= 7406= 20000500= 28300= 2512= 4350= 530-250= 600120= 185-86= 906= 700-7= 120+390= 64+36-58= 403825= 2965= (18+25)4= 7125+125= 1007+7= 90-69+27= 410-350-20= 25(100+2)= 95(100-1)= 7(40+7)= 645-(500-1)= 870-130-150=

6、53-38-14= 196+116= 827-59-241= 678-372-28= 17+15+18= 5000+4000-300= 310+260+420= 283+164= (120-302)4= (305+30)5= 42018+580+180= 75(18+14-27)= 9006- 52040= 60-60(43)= 87(20+30-47)= 90+90(488)= 655+39= 8.2+0.54+0.46= 6400200= 2508= 3.9+2.03= 250-160= 56040= 827125= 12700= 1-0.2= (180+20)5= 21000= 1260

7、30= 719+7= 2518= 14.5100= （150+50）8= 49035= 14.5100= 4284= 272-97= 1.29-0.18= 18054= 198+27= 8+0.4= 2.5+3.2= 10340= (22+78)7= 1603= 2.4-1.7= 2.4-1.8= 0.25+0.75= 86.2+15.8= 2133= (25+24) 4= 8-2.5= 175-35= 420-150= 9+0.1= 46+49+51= 174-48-52= 1.05-0.09= 8(125+50)= 42060= 0.6+7.45= 724+284= 2008= 20-19

8、.7= 89100= 731= 0.82+0.08= 0.6310= 410= 171000= 0.56+0.4= 1.25100= 5.6+99= 10025= 1-0.93= 52= 4(25+50)= 90-0.9= 5400600= 7.610= 7.06100= 345+298= 2.510= 65.8100= 91.051000= 30015= 0.051000= 1460= 0.81-0.19= 1-0.37= 0.5+0.4= 0.9-0.3= 0.35+0.43= 2.8-1.2= 9.7-7= 7.8+2.2= 5.8-5= 6.7+3= 4060= 840 21= 245

9、0= 1-0.08= 621-199= 7.8+2.2= 750260= 360+640= 12-1.46-0.54= 5.6+2.3+0.7= 8800800= 110600= 256= 30270= 9015= 17575= 57亿+13亿= 61万25万= 114411=320168= 40235=91258=430270= 376-198=2.5+3.2=9.94.8=80.72= 0.25+0.75=381938= 78030= 254 4005 12200= 6025= 30015= 90030= 847= 535= 64040= 96060= 4250= 0.60.47= 258

10、= 10.06= 0.84.7= 0.75100= 5.610010= 410= 0.08 +1.22= 45万+256万= 7.41000= 4(257)= 171000= 72060= 1-0.93= 7800= 760-450= 310+48= 240+160= 9060= 670-500= 76万+19万= 98-49= 410-203= 230万-70万= 82万-54万= 320+60= 860-47= 72030= 7979= 430190= 51030= 340+270= 7218= 9015= 72012= 0578= 38+90= 13050= 38056= 580410= 19668= 18万23万=1000620= 410-203= 0578= 38+90= 7979= 84万48万= 64万34万= 72008= 9616= 98-49= 340+270= 7218= 9015= 72012= 12524= 72048= 630452= 299+435= 260-98= 25245= 3.72.5= 12062= 96048= 431+199= 362-103= 36085= 2532= 72048= 5.53