45—50道五年级递等试计算（附答案）

0.64×25×7.8+2.2 =0.16*4*25*7.8+2.2 =0.16*100*7.8+2.2 =16*7.8+2.2 =127 2÷2.5+2.5÷2 =4/5+5/4 =2.05 194－64.8÷1.8×0.9 =194-36*0.9 =194-32.4 =161.6 36.72÷4.25×9.9 =8.64*9.9 =85.536 5180－705×6 =5180-4230 =950 24÷2.4－2.5×0.8 =10-2 =8 (4121+2389)÷7 =6510/7 =930 671×15-974 =10065-974 =9091 469×12+1492 =5628+1492 =7120 405×(3213-3189) =405*24 =9720
(73-14)+(8-2)=59+6=65, (73-14)+(8-6)=59+2=61, (73-19)+(8-2)=54+6=60
(73-19)+(8-6)=54+2=56, (73-54)+(8-2)=19+6=25, (73-54)+(8-6)=19+2=21
(73-59)+(8-2)=14+6=20, (73-59)+(8-6)=14+2=16, (81-24)+(9-3)=57+6=63
(81-24)+(9-6)=57+3=60, (81-27)+(9-3)=54+6=60, (81-27)+(9-6)=54+3=57
(81-35)+(9-2)=46+7=53, (81-35)+(9-7)=46+2=48, (81-36)+(9-2)=45+7=52
(81-36)+(9-7)=45+2=47, (81-45)+(9-2)=36+7=43, (81-45)+(9-7)=36+2=38
(81-46)+(9-2)=35+7=42, (81-46)+(9-7)=35+2=37, (81-54)+(9-3)=27+6=33
(81-54)+(9-6)=27+3=30, (81-57)+(9-3)=24+6=30, (81-57)+(9-6)=24+3=27
(83-14)+(7-2)=69+5=74, (83-14)+(7-5)=69+2=71, (83-19)+(7-2