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计算能用简便的要简便618×8+8×3123200÷4÷25525×39÷25(720-180)÷27×164.02-2.5+0.9851.27-8.66-1.3424.42-(6.5+0.42)-3.545×10113.75-4.18-5.8275+360÷(20-5)99×5623.38-(19.38-4.76)

题目详情

计算能用简便的要简便
618×8+8×312
3200÷4÷25
525×39÷25
(720-180)÷27×16
4.02-2.5+0.98
51.27-8.66-1.34
24.42-(6.5+0.42)-3.5
45×101
13.75-4.18-5.82
75+360÷(20-5)99×56
23.38-(19.38-4.76)
▼优质解答
答案和解析
(1)618×8+8×312
=(618+312)×8
=930×8
=7440;

(2)3200÷4÷25
=3200÷(4×25)
=3200÷100
=32;

(3)525×39÷25
=525÷25×39
=21×39
=819;

(4)(720-180)÷27×16
=540÷27×16
=20×16
=320;

(5)4.02-2.5+0.98
=4.02+0.98-2.5
=5-2.5
=2.5;

(6)51.27-8.66-1.34
=51.27-(8.66+1.34)
=51.27-10
=41.27;

(7)24.42-(6.5+0.42)-3.5
=24.42-0.42-(3.5+6.5)
=24-10
=14;

(8)45×101
=45×(100+1)
=45×100+45×1
=4500+45
=4545;

(9)13.75-4.18-5.82
=13.75-(4.18+5.82)
=13.75-10
=3.75;

(10)75+360÷(20-5)
=75+360÷15
=75+24
=99;

(11)99×56
=(100-1)×56
=100×56-1×56
=5600-56
=5544;

(12)23.38-(19.38-4.76)
=23.38-19.38+4.76
=4+4.76
=8.76.