31 Interpretations of Addition and Subtraction CASI Class Ac

3.1 Interpretations of Addition and Subtraction CA-SI Class Activity 3D Identifying Problem Types and nd Difficult Language Do the following for each of the next problems: Identify the type and subtype of the problem Formulate an equation that fits with the language of the story problem Identify the language that might cause students to solve the problem incorrectly if they rely only on keywords.gthat migh Clare had 3 bears. After she got some more bears, Clare had 12 bears. How Clare get? . 1. many bears did 2. Clare has 12 bears altogether; 3 of the bears are red and the others are blue. How many blue bears does Clare have? Kwon had some bugs. After he got 3 more bugs, Kwon had 12 bugs altogether. How many bugs did Kwon get? 3. Kwon has 12 red bugs. He has 3 more red bugs than blue bugs. How many blue bugs does Kwon have? 4. Newili has 12 red triangles and 3 blue triangles. How many more red triangles does Newili have than blue triangles? 5. 6. Matt had some dinosaurs. After he gave away 5 dinosaurs, he had 9 dinosaurs left. How many dinosaurs did Matt have at first? dinosaurs than bears. Matt has 9 dinosaurs. How many bears does Matt have? . Matt has 5 fewer dinosaurs than bears. Matt has 9 dinosaurs. How ma

Solution

(3) ==>

suppose Kwon has x bugs initially, then he got 3 more and total becomes 12

i.e. x + 3 = 12

x = 12 - 3 = 9

This means Kwon has 9 bugs initially.

(5) ==>

Newill has 12 Red triangles and 3 Blue Triangles.

More Red Triangles = 12 Red - 3 Blue = 9 Red Triangle

This means Newill has 9 more Red triangles

(7) ==>

Let Matt has x bears. Matt has 9 dinosaurs.

Matt has 5 fewer dinasaurs than bears means

x bears - 9 dinosaurs = 5

x = 5 + 9 = 14

This means Matt has 14 bears.