问题 填空题

(1)X-35=60

X-35+35=60○□

X=□

(2)X+17=57

X+17-17=57○□

x=□

(3)x÷7=105

X÷7×7=105○□

X=□

(4)0.9X=6.3

0.9X÷0.9=6.3○□

x=□

答案

(1)X-35=60,

X-35+35=60+35,

X=95;

(2)X+17=57,

X+17-17=57-17,

X=40;

(3)X÷7=105,

X÷7×7=105×7,

X=735;

(4)0.9X=6.3,

0.9X÷0.9=6.3÷0.9,

X=7.

故答案为:+,35,95,-,17,40,×,7,735,÷,0.9,7.

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