Question

巧用乘法分配律

4300×35+43×6500 9999×7778+3333×6666

Answer 1

4300×35+43×6500
=43×100×35+43×6500
=43×3500+43×6500
=43×（3500+6500）
=43×10000
=430000

9999×7778+3333×6666
=9999×7778+3333×3×2222
=9999×7778+9999×2222
=9999×（7778+2222）
=9999×10000
=99990000

Answer 2

4300×35+43×6500
=4300×35+4300×65
=4300×(35+65)
=4300×100
=430000
9999×7778+3333×6666
=9999×7778+9999×2222
=9999×(7778+2222)
=9999×10000
=99990000

Answer 3

4300*35+4300*65=4300*(35+65)=430000
3333*3*7778+3333*6666=3333*(3*7778+3*2222)=3333*(3*(7778+2222))=3333*30000=99990000