(1)99×21 (2)25×11+25 (3)36×25 (4)25×64×125 (5)654-317-87 (6)45+53+55+47
(1)99×21(2)25×11+25(3)36×25(4)25×64×125(5)654-317-87(6)45+53+55+47(7)270÷5÷6(8)3216÷1...
(1)99×21 (2)25×11+25 (3)36×25 (4)25×64×125 (5)654-317-87 (6)45+53+55+47 (7)270÷5÷6 (8)3216÷16
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(1)原式=(100-1)×21 =2100-21 =2079 | (2)原式=25×(11+1) =25×4×3 =300 |
(3)原式=9×(4×25) =9×100 =900 | (4)原式=(25×8)×(8×125) =200×1000 =200000 |
(5)原式=654-(317+87) =654-404 =250 | (6)原式=(45+55)+(53+47) =100+100 =200 |
(7)原式=270÷(5×6) =270÷30 =9 | (8)原式=3216÷4÷4 =804÷4 =201 |
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