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简便计算:2.37×2.7+2.37×7.32.5×1.25×324.8×1014.4×252.64÷5÷0.23.8×10.114.9×3.3+14.9×7.70.23×24+2.3×8.6-23

题目详情
简便计算:
2.37×2.7+2.37×7.3

2.5×1.25×32
4.8×1014.4×25
2.64÷5÷0.23.8×10.1
14.9×3.3+14.9×7.70.23×24+2.3×8.6-23
▼优质解答
答案和解析
(1)2.37×2.7+2.37×7.3
=2.37×(2.7+7.3)
=2.37×10
=23.7

(2)2.5×1.25×32
=2.5×1.25×8×4
=(2.5×4)×(1.25×8)
=10×10
=100

(3)4.8×101
=4.8×(100+1)
=4.8×100+4.8
=480+4.8
=484.8

(4)4.4×25
=(4+0.4)×25
=4×25+0.4×25
=100+10
=110

(5)2.64÷5÷0.2
=2.64÷(5×0.2)
=2.64÷1
=2.64

(6)3.8×10.1
=3.8×(10+0.1)
=3.8×10+3.8×0.1
=38+0.38
=38.38

(7)14.9×3.3+14.9×7.7
=14.9×(3.3+7.7)
=14.9×11
=14.9×10+14.9
=149+14.9
=163.9

(8)0.23×24+2.3×8.6-23
=0.23×24+0.23×86-0.23×100
=0.23×(24+86-100)
=0.23×10
=2.3