计算 52.4×3/4+45.6×0.75+2÷11/3 1/2+3/4+7/8+15/16+31/32+63/64+127/128.
问题描述:
计算
52.4×
+45.6×0.75+2÷13 4
1 3
+1 2
+3 4
+7 8
+15 16
+31 32
+63 64
. 127 128
答
(1)52.4×34+45.6×0.75+2÷113=(52.4+45.6+2)×34=100×34=75;(2)12+34+78+1516+3132+6364+127128=1-12+1-14+1-18+、+1-1128=(1+1+1+1+1+1+1)-(12+14+、+1128)=7-(1-12+12-14+、+164-1128)=7-127128=6...