能简便计算的简便计算就4道!(1)2061-50 - 知识问答

能简便计算的简便计算就4道!(1)2061-5046÷87 (2)33.2-8.28-1.72(3)4.17×3.9×

3个回答

(1)
2061-5046÷87
= 2061-58
= 2003
(2)
33.2-8.28-1.72
=33.2-(8.28+1.72)
=33.2-10
=23.2
(3)
4.17×3.9×5.83
=72.9333
(4)
12×(1/2+3/4)
=12×(2/4+3/4)
=12×5/4
=3×5
=15

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