14.9×0.25×40脱式计算能简算的要简算
脱式计算(能简算的要简算)14.7×0.98+14.7×1.027.85÷0.25÷416.8÷(3.2×4-5.8)0.8×(4-3.38)÷0.011.25×3.2×...
脱式计算(能简算的要简算) 14.7×0.98+14.7×1.02 7.85÷0.25÷4 16.8÷(3.2×4-5.8) 0.8×(4-3.38)÷0.01 1.25×3.2×0.25 [1.4×2×(0.65+0.55)]÷40 2.81+4×15.2×2.5 4.5+13.4×0.5-9.9
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(1)14.7×0.98+14.7×1.02
=14.7×(0.98+1.02)
=14.7×2
=29.4
(2)7.85÷0.25÷4
=7.85÷(0.25×4)
=7.85÷1
=7.85
(3)16.8÷(3.2×4-5.8)
=16.8÷(12.8-5.8)
=16.8÷7
=2.4
(4)0.8×(4-3.38)÷0.01
=0.8×0.62÷0.01
=0.496÷0.01
=49.6
(5)1.25×3.2×0.25
=1.25×4×0.8×0.25
=(1.25×0.8)×(0.25×4)
=1×1
=1
(6)[1.4×2×(0.65+0.55)]÷40
=[1.4×2×1.2]÷40
=[2.8×1.2]÷40
=3.36÷40
=0.084
(7)2.81+4×15.2×2.5
=2.81+15.2×(4×2.5)
=2.81+15.2×10
=2.81+152
=154.81
(8)4.5+13.4×0.5-9.9
=4.5+6.7-9.9
=11.2-9.9
=1.3
=14.7×(0.98+1.02)
=14.7×2
=29.4
(2)7.85÷0.25÷4
=7.85÷(0.25×4)
=7.85÷1
=7.85
(3)16.8÷(3.2×4-5.8)
=16.8÷(12.8-5.8)
=16.8÷7
=2.4
(4)0.8×(4-3.38)÷0.01
=0.8×0.62÷0.01
=0.496÷0.01
=49.6
(5)1.25×3.2×0.25
=1.25×4×0.8×0.25
=(1.25×0.8)×(0.25×4)
=1×1
=1
(6)[1.4×2×(0.65+0.55)]÷40
=[1.4×2×1.2]÷40
=[2.8×1.2]÷40
=3.36÷40
=0.084
(7)2.81+4×15.2×2.5
=2.81+15.2×(4×2.5)
=2.81+15.2×10
=2.81+152
=154.81
(8)4.5+13.4×0.5-9.9
=4.5+6.7-9.9
=11.2-9.9
=1.3
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