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(-2)∧3/(-2.5+2.4)-(-1)∧20=? 要过程 谢谢!

脱式计算 (-2)∧3/(-2.5+2.4)-(-1)∧20 =-8÷(-0.1)-1 =80-1 =79

(1)原式=13.94+0.5-2.4 =12.04 (2)原式=0.125×8×4×25 =100 (3)原式=2.5+3.91÷1.7 =2.5+2.3 =4.8 (4)原式=4.5×[14.2+6.2] =4.5×20.4 =4.5×(20+0.4) =91.8

2.5x(-2.5-2.4+1.7) =2.5x3.2 =8

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