X − 17 = 47
X = 47 + 17
X = 64
X + 26 = 60
X = 60 − 26
X = 34
38 + x = 54
X = 54 − 38
X = 16
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X − 17 = 47
X = 47 + 17
X = 64
X + 26 = 60
X = 60 − 26
X = 34
38 + x = 54
X = 54 − 38
X = 16
Tìm x:
a) x + 26 = 54
b) 35 + x = 94
c) x – 34 = 12
Tìm x:
X:x+9<x×5<20
Tìm x:
a) x + 17 = 45
b) x – 26 = 34
c) 60 – x = 20
tìm x:x=30+126
tim x :
x + 54 + 26 = 92 - 11
38 x 12=?
17 x 26 =?
59 x 63=?
bài toán : Tính nhanh
26+17+23+14=? 46+82+18+54=? 56-3+53-6=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70=?
Đặt tính rồi tính:
a) 65 + 26
b) 46 + 54
c) 93 – 37
d) 100 – 28