同類項をまとめる(小数)2(6問)
同類項をまとめて簡単にせよ。
-1.4a2+0.8a-2.1a2
解答○ ×0.9x2-0.1x-x2-0.3x
解答○ ×-2.9a2+1.5a-0.1b+3.7a2-0.9b
解答○ ×4.2x2-2.5x+3.1x2+1.8
解答○ ×-2.3a2+4.8a-5.2-1.9a2+6.3
解答○ ×-0.8x2-0.7x+2.1y+1.5x2+0.3x-1.1y
解答○ ×問題と解答
-1.4a2+0.8a-2.1a2-3.5a2+0.8a 0.9x2-0.1x-x2-0.3x-0.1x2-0.4x -2.9a2+1.5a-0.1b+3.7a2-0.9b0.8a2+1.5a-b 4.2x2-2.5x+3.1x2+1.87.3x2-2.5x+1.8 -2.3a2+4.8a-5.2-1.9a2+6.3-4.2a2+4.8a+1.1 -0.8x2-0.7x+2.1y+1.5x2+0.3x-1.1y0.7x2-0.4x+y
