36*19+64*144如何简便

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36*19+64*144如何简便
36*19+64*144如何简便

36*19+64*144如何简便
36*19+64*144
= 19*36+64*4*36
= 19*36+256*36
= (19+256)*36
= 275*2*2*9
= 550*2*9
= 1100*9
= 9900

36×19+64×144
=36×19+64×4×36
=36×(19+64×4)
=36×(19+256)
=36×275
=36×(300-25)
=36×300-36×25
=10800-36×100÷4
=10800-36÷4×100
=10800-900
=9900