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7.2÷1.6+0.8(脱式计算)

7.2÷1.6+0.8 =4.5+0.8 =5.3

7.2÷1.6+0.8 =4.5+0.8 =5.3

=4.5+0.8=5.3

2.1-0.5×1.6÷0.8 =2.1-0.8÷0.8 =2.1-1 =1.1

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

(1)32×0.16×2.5×1.25,=8×4×0.16×2.5×1.25,=(8×1.25)×(4×2.5)×0.16,=10×10×0.16,=100×0.16,=16;(2)6.4×4.2-4.2× 2 5 ,=4.2×(6.4-0.4),=4.2×6,=25.2;(3)(0.3+ 1 5 )×1.6- 4 5 ,=0.5×1.6-0.8,=0.8-0.8,=0;(4)9÷[1-...

6.8÷0.17x1.6 =40x1.6 =64

3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5 7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7) 3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8 0.25×0.28 0.125×3.2×2.5 35×40.2 0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5 3.5×101-3.5 3.5×9.9+3...

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