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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

=4.5+0.8=5.3

7.8×1.6-7.8×0.6 =7.8x(1.6-0.6) =7.8x1 =7.8

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...

0.35×1.6+0.35×3.4 0.25×8.6×4 6.72-3.28-1.72 0.45+6.37+4.55 5.4+6.9×3-(25-2.5)2×41846-620-380 4.8×46+4.8×54 0.8+0.8×2.5 1.25×3.6×8×2.5-12.5×2.4 28×12.5-12.5×20 23.65-(3.07+3.65) (4+0.4×0.25)8×7×1.25 1.65×99+1.65 27.85-(7....

7/8+2/3÷1/10+1/8 =(7/8+1/8)+2/3X10 =1+20/3 =1+6+2/3 =7又3分之2

(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-...

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...

第一个3.4 第二个3.78

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