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+ = - = + = 1- =
70×60= 200÷4= 32×30= 906÷3=
6.7-1.4= 83×10= 50÷100=
0.6+8.5= + = - =
420÷7= 25×5= 2.1-0.1=
9×70= 1200÷3= 8×7+4=
0.4+0.6= = 6×9-5=
①16×10= 20×40 = 8×1000= 67×100=
②
③0.3+0.5= 1.9-0.2= 2.2+4.3= 1-0.2=
进入组卷