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7.2÷1.6+0.8脱式简便运算

7.2÷1.6+0.8 =4.5+0.8 =5.3

=4.5+0.8=5.3

7.2÷1.6+0.8 =4.5+0.8 =5.3

2.1-0.5×1.6÷0.8 =2.1-0.8÷0.8 =2.1-1 =1.1

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

6.8÷0.17x1.6 =40x1.6 =64

89×99+89 2.63+5.8+7.37+4.2 52×15-5×52 55×102 2.58-1.6+3.42 125×64 45×25+75×45 23.5-2.8-7.2 58.65-(3.2+8.65) 99×125×8 3200÷25÷4 250÷8×4 80+(146-46×3) 48-(5.2+2.03×10) 32×15+(32.6+8.09) 89×99+89 2.63+5.8+7.37+4.2 52×15-5×52...

12×23= 13×26=

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