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\(5.9+4+1+x:2=99\)
\(45+4+1+x:2=99\)
\(49+1+x:2=99\)
\(50+x:2=99\)
\(x:2=99-50\)
\(x:2=49\)
\(x=49.2\)
\(x=98\)
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<1+2+3+4+4+5+6+7+8+9>x2
=(1+9)+(2+8)+(3+7)+(4+6)+5x2
=45x2
90
k cho mìn nhé!
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\(6+7=13\)
\(2+3=5\)
\(5+7=12\)
\(99-73=26\)
\(2324234-344=2323900\)
\(65\div5=13\)
6 + 7 = 13
2 + 3 = 5
5 + 7 = 12
99 - 73 = 26
2324234 - 344 = 2323890
65 : 5 = 13
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123421 x 2 + 12312 - 1231 = 246824 + 12312 -1231
= 259136 - 1231
= 257905
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Ta có:
99 + 99 + 99 + 99
= 99 x 4
= 396
Đáp số: 396
Ta có:
99 x 4 = 396
Đáp số: 396
Vậy 99 + 99 + 99 + 99 = 99 x 4 = 396
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=1 học tốt nha em.
=1 học tốt nha em.