9.65-(7.03+1.65)的简便运算
计算下列各题,怎样简便就怎样算.0.125×4.78×802.8×3.6+1.4×2.8(0.4+40)×2.59.65-(7.03+1.65)2.25+4.8+0.75...
计算下列各题,怎样简便就怎样算. 0.125×4.78×80 2.8×3.6+1.4×2.8 (0.4+40)×2.5 9.65-(7.03+1.65) 2.25+4.8+0.75 13.75-5.28-4.72.
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(1)0.125×4.78×80
=0.125×80×4.78
=10×4.78
=47.8
(2)2.8×3.6+1.4×2.8
=(3.6+1.4)×2.8
=2.8×5
=14
(3)(0.4+40)×2.5
=0.4×2.5+40×2.5
=1+100
=101
(4)9.65-(7.03+1.65)
=9.65-1.65-7.03
=8-7.03
=0.97
(5)2.25+4.8+0.75
=2.25+0.75+4.8
=3+4.8
=7.8
(6)13.75-5.28-4.72
=13.75-(5.28+4.72)
=13.75-10
=3.75
=0.125×80×4.78
=10×4.78
=47.8
(2)2.8×3.6+1.4×2.8
=(3.6+1.4)×2.8
=2.8×5
=14
(3)(0.4+40)×2.5
=0.4×2.5+40×2.5
=1+100
=101
(4)9.65-(7.03+1.65)
=9.65-1.65-7.03
=8-7.03
=0.97
(5)2.25+4.8+0.75
=2.25+0.75+4.8
=3+4.8
=7.8
(6)13.75-5.28-4.72
=13.75-(5.28+4.72)
=13.75-10
=3.75
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