Mental Math
5 + 9 =
14
(I added by making 9 a 10 then adding 5 + 10 = 15 then minus 1 I borrowed = 14
1,241 + 452 =
1,693
8,465 + 1,823 =
10,288
Eleen has 24 stickers. Her friend gives her 15 more stickers. How many stickers does Eleen have altogether?
39 stickers
Zayd has $7. He earns $5 for helping at home and $4 for cleaning his room. How much money does Zayd have now?
$16
5 + 4 =
9
(I made 4 into a 5 then 5 + 5 = 10 then I minus the 1 I borrowed = 9)
2,421 + 1,231 =
3,652
3,789 + 4,399 =
8,188
A library has 136 books on one shelf and 245 books on another shelf. How many books are on the two shelves altogether?
381 books
Yusuf earns $14 doing chores, $9 helping his neighbor, and $17 for washing the car. How much money did Yusuf earn in all?
$40
22 + 35 =
57
(I added the tens and ones, so it was 20 + 30 = 50 then 2 + 5 = 7 combine then and you get 57)
7,352 + 2,336 =
9,688
6,488 + 2,391 =
8,879
Arisha has 25 red beads and 18 blue beads. She gets 12 more beads from her teacher. How many beads does Arisha have altogether?
55 beads
OCS is selling Maher Zain tickets. They collect $125 on Monday, $238 on Tuesday, and $176 on Wednesday. On Thursday, they collect $94 more than Monday. How much money did they collect altogether?
$758
98 + 53
151
(I turned my 98 into a friendly 100, then I added 100 + 53 = 152, then I subtracted the 2 I borrowed and my answer is 151)
8,444 + 1,323 =
9,767
5,387 + 3,899 =
9,286
Zain read 145 pages on Monday and 128 pages on Tuesday. On Wednesday, he read 37 more pages than he read on Tuesday. How many pages did Zain read in all three days?
438 pages
The Deen Store earned $315 on Wednesday, $428 on Thursday, and $267 on Friday. On Monday, the store earned $156 more than Friday. How much money did the store earn over all four days?
$1,433
49 + 44 =
93
(I turned my 49 into a friendly 50, 50 + 44 - 94 then I subtracted the 1 I borrowed and my answer is 93)
7,345 + 2,553 =
9,898
6,396 + 2,789 =
9,185
OCS did a recycling challenge. They collected 348 cans in September, 275 cans in October, and 426 cans in November. In December, they collected 189 more cans than they collected in October. How many cans did the school collect during all four months?
1,427 cans.
A dinosaur theme park made $425 on Saturday from ticket sales, $318 from snacks, and $267 from dinosaur toys. On Sunday, the park made $156 more than it made on Saturday. How much money did the dinosaur park make altogether?
$2,176