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- = + = 1- = + =
+ = + = + + = 1- + =
6.8-0.8= 1-0.7= 4.9+5.1= 23.6-3.6=
0.6+0.2= 1.6÷10= 0.32×1000= 45×20=
①87×99+87
②25×32×125
③49.28-(6.28+19.61)
④263-45+137-55
⑤77×116-77×16
进入组卷