Add within 50.
Understand that addition equations can be written both vertically and horizontally.
Understand that the same process is utilized to add three or more whole numbers that is used to add only 2 numbers.
Number line, Add, Plus and equals
Student added 3 addends together following the strategy of using the number line.
Students were given 4 and more numbers with combination of one-digit and two-digit numbers using number line.
20+3+7 = ? (30)
15+2+5+4 = ? (26)
21+3+5+2+6 = ? (37)
Subtract within 50.
Recognize the arithmetic symbols in a subtraction equation: minus (-) and equals (=).
Understand that subtraction equals can be written both vertically and horizontally.
Understand that the same process is utilized to add three or more whole numbers that is used to add only two numbers.
Minus, Equals, Subtract, Take away
Students used the number line to answer the number sentence. From the minuend, student will move to the left/backwards to find the difference.
Students were given 3 combination two-digit and one-digit numbers to subtract.
Students find the missing number in the number sentence.
30-3-4 = ? (23)
41-2-6 = ? (33)
50-7-3 = ? (40)