hello; how are you
a)
= (64 + 36) + (469 + 31)
= 100 + 500
= 600
b)
= 25 . 2018 . 4
= (25 . 4) . 2018
= 100 . 2018
= 201800
c)
= 325 . (78 + 22)
= 325 . 100
= 32500
Bài làm :
\(a,64+469+31+36\)
\(=\left(64+36\right)+\left(469+31\right)\)
\(=100+500\)
\(=600\)
\(b,25.2018.4\)
\(=100.2018\)
\(=201800\)
\(c,325.78+325.22\)
\(=325.\left(78+22\right)\)
\(=325.100\)
\(=32500\)
\(d,9.11.53+33.66.3+99\)
\(=99.\left(53+66+1\right)\)
\(=99.120\)
\(=11880\)
\(e,259.268-259.168\)
\(=259.\left(268-168\right)\)
\(=259.100\)
\(=25900\)
\(f,25.6.4.125.8\)
\(=\left(25.4\right).\left(125.8\right).6\)
\(=100.1000.6\)
\(=600000\)
Học tốt
