加法減法(分数)2(6問)
次の計算をせよ
5x+73+7x+12
解答○ ×2x+15-4x+97
解答○ ×5a-16+7a+38
解答○ ×11a-b14-13a+2b21
解答○ ×21x-9y10-4x-y15
解答○ ×3x-y+724-5x-11y+1318
解答○ ×問題と解答
5x+73+7x+1231x6+176 2x+15-4x+97-6x35-3835 5a-16+7a+3841a24+524 11a-b14-13a+2b21a6-b6 21x-9y10-4x-y1511x6-5y6 3x-y+724-5x-11y+1318-11x72+41y72-3172
