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简算0.125×3.2×0.254.8×100.156.5×99+56.57.09×10.8-0.8×7.09.
题目详情
简算
0.125×3.2×0.25
4.8×100.1
56.5×99+56.5
7.09×10.8-0.8×7.09.
0.125×3.2×0.25
4.8×100.1
56.5×99+56.5
7.09×10.8-0.8×7.09.
▼优质解答
答案和解析
①0.125×3.2×0.25
=0.125×(8×0.4)×0.25
=(0.125×8)×(0.4×0.25)
=1×0.1
=0.1
②4.8×100.1
=4.8×(100+0.1)
=4.8×100+4.8×0.1
=480+0.48
=480.48
③56.5×99+56.5
=56.5×(99+1)
=56.5×100
=5650
④7.09×10.8-0.8×7.09
=7.09×(10.8-0.8)
=7.09×10
=70.9
=0.125×(8×0.4)×0.25
=(0.125×8)×(0.4×0.25)
=1×0.1
=0.1
②4.8×100.1
=4.8×(100+0.1)
=4.8×100+4.8×0.1
=480+0.48
=480.48
③56.5×99+56.5
=56.5×(99+1)
=56.5×100
=5650
④7.09×10.8-0.8×7.09
=7.09×(10.8-0.8)
=7.09×10
=70.9
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