MENTAL MATH
USING MANTAL MATH, HOW CAN YOU SUBTRACT 73-4?
BREAK APART 4 BY SUBTRACTING 3 FROM 73, TO GET 70. THEN SUBTRACT 1 FROM 70. MY ANSWER IS 69
SUBTRACT 9-4
5
TRUE OR FALSE:
8 MARBLES PLUS 3 MARBLES = 10 MARBLES?
FALSE
WHAT IS THE NAME OF THE STRATEGY THAT REQUIRES YOU TO ADD UP TO SUBTRACT?
NUMBER LINE
Mrs. Taylor has 59 buttons to sew on a curtain. If she only need 46 buttons. How many buttons does she have left?
13
USING MENTAL MATH, SUBTRACT 74 MINUS 5
69
SUBTRACT 52-14
38
I WANT TO GET TO THE SUM OF 20.
WHAT TWO ADDENDS THAT ENDS IN THE NUMBER 5, CAN I USE TO GET THE SUM OF 20?
15 + 5
I WANT TO DRAW SOMETHING TO REPRESENT 85 - 5. WHAT STREGY AM I?
A PICTURE
There are 24 cookies on the table. 15 fell on the floor. How many cookies are still left on the table?
19
WHAT IS THE DEFINIATION OF MENTAL MATH?
SOLVING MATH IN YOUR HEAD WITHOUT WRITING IT DOWN.
WHAT IS 88-9?
79
ADD 27 + 15
42
I ADD TO AND SUBTRACT FROM BOTH ADDENDS TO SOLVE THE PROBLEM. WHAT STRATEGY AM I?
COMPENSATION
73 PEOPLE ARE ON A TRAIN. AT A TRAIN STOP 24 PEOPLE GET OFF AND 19 PEOPLE GET ON. HOW MANY PEOPLE ARE ON THE TRAIN NOW?
49 PEOPLE ARE ON THE TRAIN NOW
THE NUMBER IS 17. NAME 4 EQUATIONS YOU CAN ADD TO GET THE SUM OF 17?
10 + 7
9 + 8
11 + 6
12 + 5
WHAT IS 10-10
0
I WANT TO COUNT ON FROM 18 TO FIND THE SUM OF 30. WHAT NUMBER SHOULD I ADD TO 18?
12
DECOMPOSE OR PARTIAL SUM
SUE BUYS A BOX OF 60 CRAFT STICKS. SHE USES 37 CRAFT STICKS FOR HER PROJECT. HOW MANY CRAFT STICKS ARE LEFT?
23
WITHOUT WRITING IT DOWN, WHAT IS 50 PLUS 10?
60
SUBTRACT 15 FROM 50
45
ADD 99 + 1
100
I AM FILLED WITH NUMBERS TO 100. YOU CAN USE ME TO ADD AND SUBTRACT. WHAT STRATEGY AM I?
100 CHART
MARIA MAKES 21 THANK YOU CARDS. SHE MAILS 13 OF THE CARDS. HOW MANY CARDS DOES SHE HAVE LEFT?
8