题目内容

44+X=5291-X=46X-16=77X×29=34835×X=21
X÷327=98640÷X=320840×X=840420+X×5=167 1224÷X+109=211.
(1)44+X=52
44+X-44=52-44,
x=8;

(2)91-X=46,
91-X+x=46+x,
46+x=91,
46+x-46=91-46,
x=45;

(3)X-16=77,
X-16+16=77+16,
x=93;

(4)X×29=348,
X×29÷29=348÷29,
x=12;

(5)35×X=21,
35×X÷35=21÷35,
x=0.6;

(6)X÷327=9,
X÷327×327=9×327,
x=2943;

(7)8640÷X=320,
8640÷x×x=320×x,
320x÷320=8640÷320,
x=27;

(8)840×X=840,
840×X÷840=840÷840,
x=1;
(9)420+X×5=167,
420+X×5-420=167-420,
5x÷5=-253÷5,
x=-50.6;

(10)1224÷X+109=211,
 1224÷x+109-109=211-109,
1224÷x×x=102×x,
102x÷102=1224÷102,
x=12.
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