递等式计算(能简便的最好要简便计算):8.8×1.25×0.2 ...
递等式计算(能简便的最好要简便计算):8.8×1.25×0.21.01×6.74.8×(11.8-15.6÷2.5)5.3×5.3+5.3×4.71.7÷3.4×(0.9...
递等式计算(能简便的最好要简便计算):8.8×1.25×0.2 1.01×6.74.8×(11.8-15.6÷2.5)5.3×5.3+5.3×4.71.7÷3.4×(0.9+1.2)7.28-4.4-2.2+6.72
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(1)8.8×1.25×0.2
=8×1.1×1.25×0.2
=(8×1.25)×(0.2×1.1)
=10×0.22
=2.2
(2)1.01×6.7
=1×6.7+0.01×6.7
=6.7+0.067
=6.767
(3)4.8×(11.8-15.6÷2.5)
=4.8×(11.8-6.24)
=4.8×5.56
=26.688
(4)5.3×5.3+5.3×4.7
=5.3×(5.3+4.7)
=5.3×10
=53
(5)1.7÷3.4×(0.9+1.2)
=1.7÷3.4×2.1
=0.5×2.1
=1.05
(6)7.28-4.4-2.2+6.72
=(7.28+6.72)-(4.4+2.2)
=14-6.6
=7.4
=8×1.1×1.25×0.2
=(8×1.25)×(0.2×1.1)
=10×0.22
=2.2
(2)1.01×6.7
=1×6.7+0.01×6.7
=6.7+0.067
=6.767
(3)4.8×(11.8-15.6÷2.5)
=4.8×(11.8-6.24)
=4.8×5.56
=26.688
(4)5.3×5.3+5.3×4.7
=5.3×(5.3+4.7)
=5.3×10
=53
(5)1.7÷3.4×(0.9+1.2)
=1.7÷3.4×2.1
=0.5×2.1
=1.05
(6)7.28-4.4-2.2+6.72
=(7.28+6.72)-(4.4+2.2)
=14-6.6
=7.4
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