1.
51 x 98 =
789 x 15 =
987 x 65 =
2.
X x 1 + X x 2 + X x 3 + X x 4 + X = 800 x 3
1. 51 x 98 = 789 x 15 = 987 x 65 = 2. X x 1 + X x 2 + X x 3 + X x 4 + X = 800 x 3
By Aaliyah
By Aaliyah
1.
51 x 98 =
789 x 15 =
987 x 65 =
2.
X x 1 + X x 2 + X x 3 + X x 4 + X = 800 x 3
Giải thích các bước giải:
1.
51 x 98 = 4998
789 x 15 = 11835
987 x 65 = 64155
2.
X x 1 + X x 2 + X x 3 + X x 4 + X = 800 x 3
X×(1+2+3+4+1)=2400
X×10=2400
X=2400÷10
X=240
Cho mk ctlhn nhé
1.
51 x 98 = 4998
789 x 15 = 11835
987 x 65 = 64155
2.
X x 1 + X x 2 + X x 3 + X x 4 + X = 800 x 3
X x ( 1 + 2 + 3 + 4 + 1 ) = 2400
X x 10 = 2400
X = 2400 : 10
X = 240