解决问题.pptx
,8×3= 5×7= 9×7= 3×4=,24,35,63,,2×5=10( ),,4×6=24( ),,10+24=34( ),,,6×5=30( ),,30+4=34( ),,,,,,,,,,,,, ,2×7=14,14+14+5=33,2×7=14,,28+5=33,4×7=28,7×4=28,28+5=33,,,,,,,,,,,,,,,,,,,,,,,,2×8=16,16+16+1=33,2×8=16,32+1=33,8×4=32,4×8=32,32+1=33,4×5+3= 3×3 -1=,23,8,,, ,30,4×7=,5×6=,2×8=,5×4=,9×6=,5×9=,7×6=,9×3=,28,30,16,20,54,45,42,27,,2×7=14( ),14+14+5=33( ),2×7=14( ),,,28+5=33( ),4×7=28( ),7×4=28( ),28+5=33( ),,2×8=16( ),16+16+1=33( ),2×8=16( ),,,32+1=33( ),4×8=32( ),8×4=32( ),32+1=33( ),,,,,,,,,,,,,,, ,9 ,,?( ),,