日期:用时:加法口算1/758+15=59+30=39+40=79+6=75+19=54+7=59+40=46+35=77+10=55+18=41+40=27+22=80+7=79+13=63+35=77+18=79+19=36+27=39+10=46+26=20+40=74+20=33+41=27+55=20+9=62+13=31+46=67+19=78+18=69+9=65+11=51+30=32+46=39+52=44+54=64+30=82+16=61+14=70+25=30+35=80+14=47+37=日期:用时:减法口算2/762-21=27-26=50-16=85-20=41-6=24-22=54-8=32-20=88-74=53-29=57-41=69-22=35-29=21-7=65-59=27-16=76-76=76-41=34-10=96-26=75-20=22-19=38-29=44-39=65-51=96-29=71-64=40-13=78-20=51-39=36-26=82-78=99-11=87-8=56-48=69-17=37-7=64-39=63-62=43-36=85-35=78-23=日期:用时:乘法口算3/72×8=9×6=5×6=8×6=8×9=9×2=2×7=4×9=3×2=3×6=8×5=8×2=8×8=5×3=8×3=5×4=8×4=7×2=9×9=5×2=4×2=6×7=6×2=7×7=6×8=9×7=8×7=6×3=3×8=2×4=3×7=7×4=3×3=2×2=5×9=6×5=4×7=9×8=4×8=4×4=4×6=7×9=日期:用时:连加连减4/751+6+12=58+25+10=25+23+10=29+20+18=42+23+10=59+30+8=29+21+33=34+11+26=55+30+12=58+14+9