a)45,28 + 52,17 - 15,28 - 12,17
= ( 45,28- 15,28) + ( 52,17-12,17)
=30+40
= 70
b)4,86 × 0,25 × 40
= 4,86 . 10
= 48,6
\(a.45,28+52,17-15,28-12,17\)
\(=\left(45,28-15,28\right)+\left(52,17-12,17\right)\)
\(=30+40\)
\(=70\)
\(b.4,86\times0,25\times40\)
\(=4,86\times\left(0,25\times40\right)\)
\(=4,86\times10\)
\(=48,6\)
a)45,28 + 52,17 - 15,28 - 12,17
=(45,28 - 15,28) + (52,17 -12,17)
=30+40
=70
b)4,86 × 0,25 × 40
=4,86 x (0,25 x 40)
=4,86 x 10
=48,6
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