Add within 50.
Recognize the arithmetic symbols in an addition equation: plus (+) and equals (=).
Understand that addition means to put two quantities together.
Understand that adding numbers means making a larger number.
Count on from a given number to add another quantity.
Understand that the same process is utilized to add three or more whole numbers that is used to add only 2 numbers.
Put together, Add, Sum, number line
- Students were given 3 addends equation to add starting from the biggest number. Using the number line, they start to the big number and add the 2 addends by moving forward in the line.
- Student fill out the missing addend by using the number line. They did this by adding the 2 numbers given and find out how many times they need to jump to go to the sum.
- Students add the given addends by making their own number line.
- Using the number line, students were introduced to subtracting with 3 or more subtrahend.
Add the following numbers:
1. 32+5+3 = ? (40)
2. 40+7+2+1 = ? (50)
3. 31+4+2+4 = ? (41)