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7.2÷1.6+0.8用梯等式简便运算

因题干不完整,无法作答

7.2÷1.6+0.8 =4.5+0.8 =5.3

(1)3060÷15-2.5×2.4,=204-2.5×4×0.6,=204-10×0.6,=204-6,=198;(2)1.05×(3.8-0.8)÷6.3,=1.05×3÷6.3,=1.05×3÷(3×2.1),=1.05×3÷3÷2.1,=1.05÷2.1,=0.5;(3)2.1×4+1.6,=8.4+1.6,=10;(4)5.25-(1.25+2.4),=5.25-1.25-2.4,...

解: 58+300÷12 =58+300÷3÷4 =58+100÷4 =58+25 =83 (4.8-1.6÷2)×2.5 =(4.8-3.2)×2.5 =1.6×2.5 =0.4x(4x2.5) =0.4x10 =4 12.5×(0.96×0.8) =12.5×0.8×0.96 =10×0.96 =9.6 15分之8÷5+15分之7×5分之1 =15分之8×5分之1+15分之7×5分之1 =(15分之...

6.8/0.17*1.6=40*1.6=64

(1)3060÷15-2.5×2.4,=204-2.5×4×0.6,=204-10×0.6,=204-6,=198;(2)1.05×(3.8-0.8)÷6.3,=1.05×3÷6.3,=1.05×3÷(3×2.1),=1.05×3÷3÷2.1,=1.05÷2.1,=0.5;(3)2.1×4+1.6,=8.4+1.6,=10;(4)5.25-(1.25+2.4),=5.25-1.25-2.4...

(1)7.8÷2.6+2.7×1.5=3+4.05=7.05;(2)35.6-5×1.7=35.6-8.5=27.1;(3)55.4×1.6-55.4×0.6=55.4×(1.6-0.6)=55.4×1=55.4;(4)21÷2.5÷0.4=21÷(2.5×0.4)=21÷1=21;(5)6.33×101-6.33=6.33×(101-1)=6.33×100=633;(6)(1.1-0.78)×(2...

(1)4.7+3.2×0.4÷1.6 =4.7+3.2÷1.6×0.4,=4.7+2×0.4,=4.7+0.8,=5.5;(2)13×65+16892÷82 =845+206,=1051;(3)(2-35)÷(112+415)=75÷720,=4;(4)[1×(34+38)]÷0.25=[1×98]÷14,=98×4,=92.

0.8×[(10-6.76)÷1.2] 18.1×0.92+3.93 0.0430.24+0.875 0.4×0.7×0.25 0.75×102 100-56.23 0.78+5.436+1 4.07×0.86+9.12.5 194-64.8÷1.8×0.9 .(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6 2.22×9.9+6.66×6.7 0.35×1.25×2×0.8 32.4×0.9+0.1×3...

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