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7.2÷1.6+0.8脱式简便运算

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...

(1)1.25×2.6×0.8,=1.25×0.8×2.6,=1×2.6,=2.6;(2) 3 8 ×(1.6+2 2 3 ),= 3 8 ×1.6+ 3 8 × 8 3 ,=0.6+1,=1.6;(3)95.6 ÷ 1 18 + 4 2 5 ×18,=95.6×18+ 4 2 5 ×18,=(95.6+4.4)×18,=100×18,=1800.

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....

0.4×125×25×0.8 =(0.4×25)×(125×0.8) =10×100=1000 1.25×(8+10) =1.25×8+1.25×10 =10+12.5=22.5 9123-(123+8.8) =9123-123-8.8 =9000-8.8 =8991.2 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76) =8.3×3=24.9 9999×1001 =9999×(1000+1) =9999×...

180÷9-18 (48+52)÷5 100-25×4 20+80×3 7×(34+56) 105×2×5 800-57×9 (65+16)÷9 230×(140-132) 24×5+24×7 (2534-958)÷8 792×7÷9 (5021-3918)×6 1208-237×5 4280÷(19-11) 190+360÷24×8 (140+60)×(26-8) 78×7+828÷18 (359-42...

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....

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