Mental Math
What is the sum?
523+100=?
523+100=623
What is the expanded form of 789
700+80+9
Decompose both addends to solve the equation
542+232=
500+200+700
40+30=70
2+2=4
700+70+4=774
What number is in the ones place in the number 982?
2 is in the ones place
What is the sum?
687+100=?
687+100=787
What is the expanded form of 921
900+20+1
Decompose both addends to solve the equation
135+247
100+200=300
30+40=70
5+7=12
300+70+12=382
What number is in the ones place is 623?
3 is in the ones place
What is the sum?
699+10=?
699+10=709
What is the expanded form of 929
900+20+9
Decompose both addends to solve the equation
542+365
500+300=800
40+60=100
2+5=7
800+100+7=907
What is the value of the number in the tens place in the number 254?
50
What is the sum?
759+100=?
759+100=859
What is the expanded form of 191
100+90+1
Decompose both addends to solve the equation
268+347
200+300=500
60+40=100
8+7=15
500+100+15=615
What place value is the number 7 in? 572
The tens place
What is the sum?
580+110=?
580+110=690
What is the expanded form of 206
200+0+6
Decompose both addends to solve the equation
284+654
200+600=800
80+50=130
4+4=8
800+130+8=938
What is the value of the number in the hundreds place in the number 652?
600