二年级数学寒假作业2x3+6=5x4+3=4x5-7=3x4+9=6x3+7=40-10-9=72-3-50=6x6+8=6x7+40=6x7+9=7x7-10=6x7-9=3x8+9=8x7-10=8x5+7=7x7+7=5x8+32=3x8-15=9+21+70=45-(40+5)=9+(40-38)=87-(67-30)=45+(52-28)=43-4x7=17+28+28=5x3+4=5x5+10=3x5+8=2x6+9=5x6-7=46+4-20=6x2+8=27-9+50=7x4-2=7x3+40=2x7+4=7x3+20=7x6+8=4x3+20=4x8+6=5x7+8=8x9+3=7x8-19=23+7+30=50-(28-8)=6x7+20=6x3+12=85-36=66-4x7=33+2+38=3x4-10=4x4+6=4x5-2=6x5+11=6x2+8=2+58+7=4x3+12=60-30+9=2x7+8=5x7+8=3x5+7=3x4+70=8x4+2=6x3+8=8x8-24=7x2+10=9x6+16=3x9+13=46-(16-10)=46-30+7=87-(49-39)=7x9+17=73-(35-24)=44-7x6=76-7x3=4x4-5=2x4+3=4x5+13=3x6+8=5x3+20=7+47-9=6x5-8=27-9+50=7x5-8=7x2+5=7x4-20=4x8+2=6x3-3=5x4-9=3x8+8=7x9-23=5x9-15=8x9-7=18+40-8=74-6-30=7x8+14-9x8+18=7x8+15=36-3x3=77+21+9=
1、46+28+23=2、42-36+51=3、70-22-28=4、81-16+33=7、86-34-49=10、37+38+24=13、42+(57-39)