简便计算.8×7.3+8×2.7356-25-3556+817+16+91725+57-25+57.-数学
题文
简便计算. 8×7.3+8×2.7 3
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答案
(1)8×7.3+8×2.7, =8×(7.3+2.7), =8×10, =80; (2)3
=3
=3
=2
(3)
=(
=1+1, =2; (4)
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题文
简便计算. 8×7.3+8×2.7 3
|
答案
(1)8×7.3+8×2.7, =8×(7.3+2.7), =8×10, =80; (2)3
=3
=3
=2
(3)
=(
=1+1, =2; (4)
|