脱式计题,能简算的要简算.(81+1813)÷9375+450÷18×2551×10112.5×32×0.25.-六年级数学

题目简介

脱式计题,能简算的要简算.(81+1813)÷9375+450÷18×2551×10112.5×32×0.25.-六年级数学

题目详情

脱式计题,能简算的要简算.
(81+
18
13
)÷9
375+450÷18×2551×10112.5×32×0.25.
题型:解答题难度:中档来源:不详

答案

(1)(81+class="stub"18
13
)÷9
=(81+class="stub"18
13
)×class="stub"1
9

=81×class="stub"1
9
+class="stub"18
13
×class="stub"1
9

=9+class="stub"2
13

=9class="stub"2
13


(2)375+450÷18×25
=375+25×25,
=375+625,
=1000;

(3)51×101
=51×(100+1),
=51×100+51,
=5100+51,
=5151;

(4)12.5×32×0.25
=(12.5×8)×(4×0.25),
=100×1,
=100.

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