52.6×0.47怎样简便就怎样计算怎么算?
3个回答
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52.6×0.47
=52.6x(0.5-0.03)
=52.6x0.5-52.6x0.03
=26.3-1.578
=24.722
=52.6x(0.5-0.03)
=52.6x0.5-52.6x0.03
=26.3-1.578
=24.722
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(1)6.71×0.52+4.8×0.671
=0.671×5.2+4.8×0.671,
=(5.2+4.8)×0.671,
=10×0.671,
=6.71;
(2)3.8+2.49+7.51+4.2
=(3.8+4.2)+(2.49+7.51),
=8+10,
=18;
(3)102×4.5
=(100+2)×4.5,
=100×4.5+2×4.5,
=450+9,
=459;
(4)31.7-0.5×0.7-1.65
=31.7-0.35-1.65,
=31.7-(0.35+1.65),
=31.7-2,
=29.7.
=0.671×5.2+4.8×0.671,
=(5.2+4.8)×0.671,
=10×0.671,
=6.71;
(2)3.8+2.49+7.51+4.2
=(3.8+4.2)+(2.49+7.51),
=8+10,
=18;
(3)102×4.5
=(100+2)×4.5,
=100×4.5+2×4.5,
=450+9,
=459;
(4)31.7-0.5×0.7-1.65
=31.7-0.35-1.65,
=31.7-(0.35+1.65),
=31.7-2,
=29.7.
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