i need to use mental math and the distributive property to simplify:
can you pls check if this correct?
a) 19(-6) i got: -114
or do i do like this:
10*(-6)=-60
9*(-6) =-54
-60 + -54= -114
b) 102* $21 i got: $2142
or do i do mental math like this:
100*21 = 2100
2 * 21 = 42
2100 + 42 = $2142
c) 26*97 i got: 2522
or do i do mental math like this:
20 * 97 = 1940
6* 97 = 582
1940 + 582 = 2522
d) 9 * $4.98 i got: $44.82
or do i do mental math like this:
9 * $4.00 = $36.00
9*.98 = 8.82
36.00 + 8.82 = $44.82
Can someone. Check
a) Your approach is correct. You used the distributive property to break down the multiplication into smaller parts and then added the results together. Your simplified answer of -114 is correct.
b) Again, your approach is correct. You used mental math to break down the multiplication into smaller parts and then added the results together. Your simplified answer of $2142 is correct.
c) Your approach is correct. You used mental math to break down the multiplication into smaller parts and then added the results together. Your simplified answer of 2522 is correct.
d) Your approach is correct. You used mental math to break down the multiplication into smaller parts and then added the results together. Your simplified answer of $44.82 is correct.