文档介绍：47+53=6×5=24+6×5=76+24=71-8×6=52+39=7×5=87-7×5=34+62=66-6×7=60-46=1×8=45-1×8=67-38=44-1×4=15+19=2×9=34-2×9=55-16=61-8×6=74+18=2×5=15-2×5=35+19=36-3×3=53+46=8×5=32+8×5=36+38=63-6×5=76-43=9×5=42+9×5=26+48=81-4×6=87-56=8×7=32-8×1=76+16=51-7×3=27+53=7×5=73-7×5=75-46=92-9×7=56-26=7×2=22-7×2=59+23=98-2×6=52+17=3×4=41-3×4=58+14=54-2×2=38+56=2×4=63-2×4=24+37=23-7×1=57+15=6×9=42+6×9=45+36=17-5×3=49+16=3×1=76-3×1=55+26=63-9×6=25+56=4×3=92-4×3=73-29=34-9×3=29+66=6×5=6+6×5=64-16=54-5×6=36+56=7×6=77-7×6=56+26=48-8×2=63-59=6×9=67-6×9=36+45=2-5×1=85-36=6×5=20+6×5=32+49=44-7×5=64-25=4×4=5+4×4=98-53=89-6×8=29+39=9×7=82-9×1=31+38=41-3×3=33+53=9×1=18-9×1=51+29=6×8-27=46+3=9×3=69-1×3=16+38=9×8-63=69+19=6×3=83-9×3=80+7=9×6-33=8×6=29+67=79-56=95-89=42+6×9=1×1=56+24=65+32=80-56=76-3×1=1×4=66-36=84-36=71+26=92-4×3=8×6=55+29=64+36=69+26=6+6×5=3×3=54+28=65+25=58-46=77-7×6=6×5=39+36=37+32=25+57=67-6×9=4×6=13+79=84-56=46+37=60-6×5=7×3=39+21=61+22=29+42=5+4×4=9×7=78-56=63+28=52+38=82-9×1=2×6=29+36=45+25=36+28=18-9×1=2×2=80-24=93-65=88-56=69-9×3=7×1=51-15=97-58=36+36=83-9×3=5×3=26+56=26+58=61+39=71-8×6=9×6=60-32=29+74=64+36=98-2×6=1×1=69+34=28+36=28+58=54-8×2=1×1=46+34=96-68=51+28=23-7×9=8×2=26+69=69-26=68-56=17-5×3=5×1=68-26=23+68=19+38=63-9×6=7×5=47-29=72-56=43+26=34-9×3=6×8=49+25=27+69=54+42=54-5×6=3×3=91-73=41-28=27+56=48-8×2=8×6=35+37=49+47=97-54=56-9×3=4×5=23+38=62+19=51-35=32+5×6=3×6=98-25=55-25=46+4