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脱式计算 (1)89.3×43+38×89.3+893×1.9 (2)10.01×101-10.01 (3)4.75×17.5+2.5×4.75 (4)1.25×32×0.25 (5)0.22×1.5

编辑:chaxungu时间:2026-04-27 13:18:13分类:小学数学题库

脱式计算(能简便算的要简便算)
(1)89.3×43+38×89.3+893×1.9(2)10.01×101-10.01(3)4.75×17.5+2.5×4.75
(4)1.25×32×0.25(5)0.22×1.5+1.541÷2.3(6)(5.15-3.25)×0.4+0.36.
(1)89.3×43+38×89.3+893×1.9,
=89.3×43+38×89.3+89.3×19,
=89.3×(43+38+19),
=89.3×100,
=8930;

(2)10.01×101-10.01,
=10.01×(101-1),
=10.01×100,
=1001;

(3)4.75×17.5+2.5×4.75,
=4.75×(17.5+2.5),
=4.75×20,
=95;

(4)1.25×32×0.25,
=1.25×8×4×0.25,
=(1.25×8)×(4×0.25),
=10×1,
=10;

(5)0.22×1.5+1.541÷2.3,
=0.33+0.67,
=1;

(6)(5.15-3.25)×0.4+0.36,
=1.9×0.4+0.36,
=0.76+0.36,
=1.12.